公网覆盖工程中红线内区域引出槽道施工技术研究

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中图分类号：TN929.5 文献标志码：A 文章编号:1003-5168(2025)24-0013-04

DOI:10.19968/j.cnki.hnkj.1003-5168.2025.24.002

Research on Construction Technology of Leading-out Duct in Red Line Area for Public Network Coverage Project

YAO Luchuan (China Railway Construction Corporation Electrification Bureau Group Southern Engineering Co, Ltd., Wuhan , China)

Abstract: [Purposes] In response to the complex structure,limited space,and frequent interference issues in the lead-out sections within red line areas of public network coverage projects,this paper proposes an adaptable and controllable technical system for leading-out duct construction to enhance signal transmission stability and construction eficiency.[Methods]By analyzing the functional positioning and layout constraints of public network coverage systems,influencing factors such as access permission, spatial overlap,and interface interference were identified.A technical approach focusing on signal routing planning,cable duct laying,connector node losscontrol,and link performance verification was established.Corresponding optimization solutions were proposed to improve signal transmission and equipment deployment methods.[Findings] After applying this technical system: the signal transmission link loss was controlled within 0.35dB/km ; the average connector insertion loss was ≤O.2 dB; the return loss was better than -60dB ； and the voltage standing wave ratio (VSWR) was ≤1.5,all meeting specification requirements. The duct fill ratio was ⩽60% ,and cable laying compliance rate improved. Manual verification efficiency was significantly enhanced by color-code zoning and a labeling system.In high-density sites with multiple operators，problems such as ODF port numbering confusion and spatial crossstacking were successully resolved,achieving interference-free multi-band signal transmission and stable interconnection between RRU and DAS systems.[Conclusions] The proposed leading-out duct construction technical system has achieved notable results in addressing various challnges in the leadout sections within red line areas,providing a practical reference for related projects.

Keywords: public network coverage project; leading-out duct; red line area; cable laying; link indicator verification

0 引言

公网覆盖系统在接人目标区域前，须跨越红线界面完成信号引出操作。（剩余5982字）